Suborder:
|
Goniatitina
|
Superfamily:
|
Pericycloidea
|
Family:
|
Muensteroceratidae
|
Genus:
|
Cluthoceras |
Qualifier:
|
ge |
Author:
|
Currie 1954,p.560
|
Lower Boundary:
|
Pendleian--Arnsbergian [PND--ARN], 324 million years
|
Upper Boundary:
|
Arnsbergian--Chokierian [ARN--CHO], 319 million years
|